红树植物的化学成分及其生物活性研究进展

由于红树植物独特的生长环境、近年来红树科属植物的化学成分和生理活性的研究已成为热点,从中发现许多结构新颖、有强烈生物活性的化合物。综述红树科属植物化学成分及生物活性的研究进展,并在此基础上对红树植物的综合利用进行展望,旨在为该属植物的进一步研究与利用提供参考。     

A Pressure-Bearing Microwave Transmission Line for Rapid Energy-Efficient Manufacturing Systems of High-End Composite Parts

Currently, a 2-port microwave transmission line with a glass window is usually used to transmit microwave energy to a pressure vessel while sealing the high-pressure gas. In this situation, the damage of the brittle glass window will inevitably result in disastrous accidents. In this paper, the idea of a “2+4”-port microwave transmission line is first proposed to solve this problem. A 4-port waveguide bridge structure is connected to the input port of a traditional 2-port structure, which can release the high-pressure gas safely when the glass window of the 2-port microwave transmitting structure fails. To test this idea, a “2+4”-port microwave transmission line at 2.45 GHz was designed and fabricated. The effectiveness of the whole system in microwave transmission was validated by both simulations and experiments. A high microwave transmittance of more than 97% in the simulation and 91% in the experiment was achieved. The long-time transmission of 15-kW microwave energy, 5 times higher than the previous work,was realized. Moreover, the effectiveness of the transmission line in releasing high-pressure gas(0.6 MPa) was validated by a series of fluid-structure interaction simulations. This research proposes a new transmission structure for transmitting microwave into a pressurized environment safely and efficiently, which can be promoted to a series of applications including vacuum electron devices, microwave ovens, and so on.     

EOS Experiments Based on the Heaven-I

A uniform planar shockwave was required by high precision equation of state （EOS） measurements. This paper presents our work in studying shockwave generated by KrF laser. There are three kinds of target were used, plane target without flyer, flyer plane target and single step target without flyer.     

美发现一种超强磁材料

据媒体报道,美国西北大学物理学家发现,高温超导体Bi-2212（一种含金属铋的化合物）是一种极好的强磁材料,若能将其加工成导线,则有望制成世界上最强的磁体,磁场强度可达30特斯拉。